<div dir="ltr">Hi Antoine,<div><br></div><div>There is the runtime parameter "<tt><a href="https://flash.rochester.edu/site/flashcode/user_support/flash4_ug_4p62/node117.html#SECTION065411000000000000000">ed_ignoreBoundaryCondition_n</a></tt>" that can be turned on for each beam that should do what you want for the beams entering the domain.</div><div><br></div><div>This would only change the boundary conditions the rays see upon entering the domain. You can look at "ed_traceRays2DRec.F90" to modify whether you want any of the boundaries to reflect rays back into the interior as they're traced</div>
<br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr" style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px">*************************************************************************</div><div dir="ltr" style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px">Adam Reyes<div><img src="https://flash.rochester.edu/site/common/images/email_signature/FLASH.jpg"><br></div><div>Code Group Leader, Flash Center for Computational Science <span> </span><br></div><div>Research Scientist, Dept. of Physics and Astronomy</div><div>University of Rochester</div><div>River Campus: Bausch and Lomb Hall, 369 <span> </span><br></div><div>500 Wilson Blvd. PO Box 270171, Rochester, NY 14627</div><div dir="ltr">Email<span> </span><a href="mailto:adam.reyes@rochester.edu" target="_blank">adam.reyes@rochester.edu</a></div><div>Web<span> </span><a href="https://flash.rochester.edu/" target="_blank">https://flash.rochester.edu</a><br></div><div> (he / him / his)</div><div><img src="https://flash.rochester.edu/site/common/images/email_signature/FLASH-pride-sml.png"><br></div>*************************************************************************</div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Aug 8, 2022 at 10:14 AM Andy Sha Liao <andy@f.energy> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Antoine,<div><br></div><div><br></div><div>You can try defining a transparent material, e.g., "glass" and placing it around the region where your plasma is evolving. </div><div><br></div><div>Instead of tabular opacity or other options, you can just set it to constant and equal to zero. </div><div><br></div><div>You can also try freezing the "glass" so it stays in place with BDRY_VAR. See if your laser can still be transmitted when the glass is frozen this way. </div><div><br></div><div><br></div><div>Andy</div><div><br></div><div></div><div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Aug 6, 2022 at 9:59 AM Antoine Gintrand <<a href="mailto:antoine.gintrand@gmail.com" target="_blank">antoine.gintrand@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear Flash users,<div><br></div><div>I am having a problem was a laser slab simulation in 2D with a 2D model of laser (not 3D to 2D). The simulation represents the heating by laser of a cylinder from one side of the cylinder axis. The cylinder target will be ablated by the laser and fill the box until the density in the box is homogeneous. </div><div><br></div><div>Here, I would like to have reflective boundaries for the flow at all edges of my 2D box in order to confine the matter inside it during the heating by laser. <br></div><div><br></div><div>First I notice that the reflective boundary also applies to the laser rays. Thus when the ray arrives at a reflective boundary it is also reflected back to the interior of the box.</div><div><br></div><div>Question 1)</div><div><br></div><div>Can I have an option to separate the boundaries for the laser and for the flow?</div><div><br></div><div>Question 2)<br></div><div><br></div><div>Is there a way to confine the plasma with reflective boundaries for the 4 edges </div><div>of the box and still, be able to let the laser heat the cylinder from a side? Now my problem is that if I put a reflective boundary where the laser comes from, the laser cannot enter the box, there is an error message and the code crashes. Also If I try to set up the laser lens inside the box to have the source of energy directly inside the closed box, it is not allowed (error message : Error message is ed_beamsCheck2DRec: Beam lens (partially) inside the domain! ).</div><div><br></div><div>Any suggestions on those issues would really help me a lot,</div><div><br></div><div>Thank you very much for the help,</div><div><br></div><div>All the best,</div><div><br></div><div>Antoine</div><div><br></div><div><br></div><div><br></div></div>
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